During the second day of Inti Raymi (or Sun Festival) every summer solstice, indigenous shaman use Cuicocha as a bath for ritual cleansing and purification.
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The intra-caldera islands, on the other hand, support some wildlife, most notably the Silvery Grebe, which lives around the reeds and feeds on small fish, frogs, crayfish, small water snakes, seeds of water plants, and insects.